There's a lot of reasons why Sony hasn't gotten any franchise to be as powerful as any given Nintendo one, particularly the Mario one. One, Sony is not an industry pioneer with any of their franchises; Super Mario Bros and Legend of Zelda literally defined their genres, and their sequels frequently re-define their genres to some degree. Two, Sony is a hardware-first company, while Nintendo is a company that focuses on hardware second and software first (meaning Nintendo has a distinct advantage in the software department). Three, Sony hasn't been around in the industry as long anyway, thus they haven't been able to build up any reasonable fan base for a given franchise.
There are other reasons too, of course, but most of them relate to those three points. And they do have at least one franchise under their belt that has a higher-than-normal level of popularity, the Gran Turismo series.
Sky Render - Sanity is for the weak.
